diff --git a/index.html b/index.html
index 088747a..e540700 100644
--- a/index.html
+++ b/index.html
@@ -4,585 +4,7 @@
     <meta charset="utf-8" />
     <title>Calendar App</title>
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
-    <style>
-        * {
-            margin: 0;
-            padding: 0;
-            box-sizing: border-box;
-        }
-
-        body {
-            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
-            background-color: #f8f9fa;
-            color: #333;
-            line-height: 1.6;
-        }
-
-        .app {
-            min-height: 100vh;
-            display: flex;
-            flex-direction: column;
-        }
-
-        .app-header {
-            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
-            color: white;
-            padding: 1rem 2rem;
-            display: flex;
-            justify-content: space-between;
-            align-items: center;
-            box-shadow: 0 2px 4px rgba(0,0,0,0.1);
-        }
-
-        .app-header h1 {
-            margin: 0;
-            font-size: 1.8rem;
-        }
-
-        .app-header nav {
-            display: flex;
-            gap: 1rem;
-            align-items: center;
-        }
-
-        .app-header nav a {
-            color: white;
-            text-decoration: none;
-            padding: 0.5rem 1rem;
-            border-radius: 4px;
-            transition: background-color 0.2s;
-        }
-
-        .app-header nav a:hover {
-            background-color: rgba(255,255,255,0.2);
-        }
-
-        .app-main {
-            flex: 1;
-            padding: 2rem;
-            max-width: 1200px;
-            margin: 0 auto;
-            width: 100%;
-        }
-
-        /* Authentication Forms */
-        .login-container, .register-container {
-            display: flex;
-            justify-content: center;
-            align-items: center;
-            min-height: 60vh;
-        }
-
-        .login-form, .register-form {
-            background: white;
-            padding: 2rem;
-            border-radius: 8px;
-            box-shadow: 0 4px 6px rgba(0,0,0,0.1);
-            width: 100%;
-            max-width: 400px;
-        }
-
-        .login-form h2, .register-form h2 {
-            text-align: center;
-            margin-bottom: 2rem;
-            color: #333;
-        }
-
-        .form-group {
-            margin-bottom: 1.5rem;
-        }
-
-        .form-group label {
-            display: block;
-            margin-bottom: 0.5rem;
-            font-weight: 500;
-            color: #555;
-        }
-
-        .form-group input {
-            width: 100%;
-            padding: 0.75rem;
-            border: 1px solid #ddd;
-            border-radius: 4px;
-            font-size: 1rem;
-            transition: border-color 0.2s;
-        }
-
-        .form-group input:focus {
-            outline: none;
-            border-color: #667eea;
-            box-shadow: 0 0 0 2px rgba(102, 126, 234, 0.2);
-        }
-
-        .form-group input:disabled {
-            background-color: #f5f5f5;
-            cursor: not-allowed;
-        }
-
-        .login-button, .register-button {
-            width: 100%;
-            padding: 0.75rem;
-            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
-            color: white;
-            border: none;
-            border-radius: 4px;
-            font-size: 1rem;
-            font-weight: 500;
-            cursor: pointer;
-            transition: transform 0.2s, box-shadow 0.2s;
-        }
-
-        .login-button:hover, .register-button:hover {
-            transform: translateY(-1px);
-            box-shadow: 0 4px 8px rgba(0,0,0,0.2);
-        }
-
-        .login-button:disabled, .register-button:disabled {
-            background: #ccc;
-            transform: none;
-            cursor: not-allowed;
-        }
-
-        .error-message {
-            background-color: #f8d7da;
-            color: #721c24;
-            padding: 0.75rem;
-            border-radius: 4px;
-            margin-bottom: 1rem;
-            border: 1px solid #f5c6cb;
-        }
-
-        .auth-links {
-            text-align: center;
-            margin-top: 2rem;
-            color: #666;
-        }
-
-        .auth-links a {
-            color: #667eea;
-            text-decoration: none;
-        }
-
-        .auth-links a:hover {
-            text-decoration: underline;
-        }
-
-        .logout-button {
-            background: rgba(255,255,255,0.2);
-            border: 1px solid rgba(255,255,255,0.3);
-            color: white;
-            padding: 0.5rem 1rem;
-            border-radius: 4px;
-            cursor: pointer;
-            transition: background-color 0.2s;
-        }
-
-        .logout-button:hover {
-            background: rgba(255,255,255,0.3);
-        }
-
-        /* Calendar View */
-        .calendar-view {
-            height: calc(100vh - 140px); /* Full height minus header and padding */
-            display: flex;
-            flex-direction: column;
-        }
-
-        .calendar-loading, .calendar-error {
-            display: flex;
-            align-items: center;
-            justify-content: center;
-            height: 100%;
-            background: white;
-            border-radius: 12px;
-            box-shadow: 0 4px 16px rgba(0,0,0,0.1);
-        }
-
-        .calendar-loading p {
-            font-size: 1.2rem;
-            color: #666;
-        }
-
-        .calendar-error p {
-            font-size: 1.2rem;
-            color: #d32f2f;
-        }
-
-        /* Calendar Component */
-        .calendar {
-            background: white;
-            border-radius: 12px;
-            box-shadow: 0 4px 16px rgba(0,0,0,0.1);
-            overflow: hidden;
-            flex: 1;
-            display: flex;
-            flex-direction: column;
-        }
-
-        .calendar-header {
-            display: flex;
-            align-items: center;
-            justify-content: space-between;
-            padding: 1.5rem 2rem;
-            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
-            color: white;
-        }
-
-        .month-year {
-            font-size: 1.8rem;
-            font-weight: 600;
-            margin: 0;
-        }
-
-        .nav-button {
-            background: rgba(255,255,255,0.2);
-            border: none;
-            color: white;
-            font-size: 1.5rem;
-            font-weight: bold;
-            width: 40px;
-            height: 40px;
-            border-radius: 50%;
-            cursor: pointer;
-            display: flex;
-            align-items: center;
-            justify-content: center;
-            transition: background-color 0.2s;
-        }
-
-        .nav-button:hover {
-            background: rgba(255,255,255,0.3);
-        }
-
-        .calendar-grid {
-            display: grid;
-            grid-template-columns: repeat(7, 1fr);
-            flex: 1;
-            background: white;
-        }
-
-        .weekday-header {
-            background: #f8f9fa;
-            padding: 1rem;
-            text-align: center;
-            font-weight: 600;
-            color: #666;
-            border-bottom: 1px solid #e9ecef;
-            font-size: 0.9rem;
-            text-transform: uppercase;
-            letter-spacing: 0.5px;
-        }
-
-        .calendar-day {
-            border: 1px solid #f0f0f0;
-            padding: 0.75rem;
-            min-height: 100px;
-            display: flex;
-            flex-direction: column;
-            cursor: pointer;
-            transition: background-color 0.2s;
-            position: relative;
-        }
-
-        .calendar-day:hover {
-            background-color: #f8f9ff;
-        }
-
-        .calendar-day.current-month {
-            background: white;
-        }
-
-        .calendar-day.prev-month,
-        .calendar-day.next-month {
-            background: #fafafa;
-            color: #ccc;
-        }
-
-        .calendar-day.today {
-            background: #e3f2fd;
-            border: 2px solid #2196f3;
-        }
-
-        .calendar-day.has-events {
-            background: #fff3e0;
-        }
-
-        .calendar-day.today.has-events {
-            background: #e1f5fe;
-        }
-
-        .calendar-day.selected {
-            background: #e8f5e8;
-            border: 2px solid #4caf50;
-            box-shadow: 0 0 8px rgba(76, 175, 80, 0.3);
-        }
-
-        .calendar-day.selected.has-events {
-            background: #f1f8e9;
-        }
-
-        .calendar-day.selected.today {
-            background: #e0f2f1;
-            border: 2px solid #4caf50;
-        }
-
-        .calendar-day.selected .day-number {
-            color: #2e7d32;
-            font-weight: 700;
-        }
-
-        .day-number {
-            font-weight: 600;
-            font-size: 1.1rem;
-            margin-bottom: 0.5rem;
-        }
-
-        .calendar-day.today .day-number {
-            color: #1976d2;
-        }
-
-        .event-indicators {
-            flex: 1;
-            display: flex;
-            flex-direction: column;
-            gap: 2px;
-        }
-
-        .event-box {
-            background: #2196f3;
-            color: white;
-            padding: 2px 4px;
-            border-radius: 3px;
-            font-size: 0.7rem;
-            line-height: 1.2;
-            overflow: hidden;
-            text-overflow: ellipsis;
-            white-space: nowrap;
-            cursor: pointer;
-            transition: background-color 0.2s;
-        }
-
-        .event-box:hover {
-            background: #1976d2;
-        }
-
-        .event-dot {
-            background: #ff9800;
-            height: 6px;
-            border-radius: 3px;
-            margin-bottom: 1px;
-        }
-
-        .more-events {
-            font-size: 0.7rem;
-            color: #666;
-            margin-top: 2px;
-            font-weight: 500;
-        }
-
-        /* Responsive Design */
-        @media (max-width: 768px) {
-            .calendar-header {
-                padding: 1rem;
-            }
-
-            .month-year {
-                font-size: 1.4rem;
-            }
-
-            .nav-button {
-                width: 35px;
-                height: 35px;
-                font-size: 1.2rem;
-            }
-
-            .weekday-header {
-                padding: 0.5rem;
-                font-size: 0.8rem;
-            }
-
-            .calendar-day {
-                min-height: 70px;
-                padding: 0.5rem;
-            }
-
-            .day-number {
-                font-size: 1rem;
-            }
-
-            .app-main {
-                padding: 1rem;
-            }
-
-            .calendar-view {
-                height: calc(100vh - 120px);
-            }
-        }
-
-        @media (max-width: 480px) {
-            .calendar-day {
-                min-height: 60px;
-                padding: 0.25rem;
-            }
-
-            .weekday-header {
-                padding: 0.5rem 0.25rem;
-            }
-
-            .day-number {
-                font-size: 0.9rem;
-            }
-        }
-
-        /* Event Modal Styles */
-        .modal-backdrop {
-            position: fixed;
-            top: 0;
-            left: 0;
-            right: 0;
-            bottom: 0;
-            background: rgba(0, 0, 0, 0.5);
-            display: flex;
-            align-items: center;
-            justify-content: center;
-            z-index: 1000;
-            backdrop-filter: blur(2px);
-        }
-
-        .modal-content {
-            background: white;
-            border-radius: 12px;
-            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
-            max-width: 500px;
-            width: 90%;
-            max-height: 80vh;
-            overflow-y: auto;
-            position: relative;
-            animation: modalAppear 0.2s ease-out;
-        }
-
-        @keyframes modalAppear {
-            from {
-                opacity: 0;
-                transform: scale(0.9) translateY(-20px);
-            }
-            to {
-                opacity: 1;
-                transform: scale(1) translateY(0);
-            }
-        }
-
-        .modal-header {
-            display: flex;
-            align-items: center;
-            justify-content: space-between;
-            padding: 1.5rem 2rem 1rem;
-            border-bottom: 1px solid #e9ecef;
-        }
-
-        .modal-header h3 {
-            margin: 0;
-            color: #333;
-            font-size: 1.4rem;
-            font-weight: 600;
-        }
-
-        .modal-close {
-            background: none;
-            border: none;
-            font-size: 1.8rem;
-            color: #999;
-            cursor: pointer;
-            padding: 0;
-            width: 30px;
-            height: 30px;
-            border-radius: 50%;
-            display: flex;
-            align-items: center;
-            justify-content: center;
-            transition: all 0.2s;
-            line-height: 1;
-        }
-
-        .modal-close:hover {
-            background: #f8f9fa;
-            color: #666;
-            transform: scale(1.1);
-        }
-
-        .modal-body {
-            padding: 1.5rem 2rem 2rem;
-        }
-
-        .event-detail {
-            display: grid;
-            grid-template-columns: 100px 1fr;
-            gap: 1rem;
-            margin-bottom: 1rem;
-            align-items: start;
-        }
-
-        .event-detail strong {
-            color: #555;
-            font-weight: 600;
-            font-size: 0.9rem;
-            text-transform: uppercase;
-            letter-spacing: 0.5px;
-        }
-
-        .event-detail span {
-            color: #333;
-            font-size: 1rem;
-            line-height: 1.5;
-            word-break: break-word;
-        }
-
-        /* Mobile adjustments for modal */
-        @media (max-width: 768px) {
-            .modal-content {
-                margin: 1rem;
-                width: calc(100% - 2rem);
-            }
-
-            .modal-header, .modal-body {
-                padding: 1rem 1.5rem;
-            }
-
-            .event-detail {
-                grid-template-columns: 80px 1fr;
-                gap: 0.75rem;
-                margin-bottom: 0.75rem;
-            }
-
-            .event-detail strong {
-                font-size: 0.8rem;
-            }
-
-            .event-detail span {
-                font-size: 0.9rem;
-            }
-        }
-
-        @media (max-width: 768px) {
-            .app-header {
-                flex-direction: column;
-                text-align: center;
-                padding: 1rem;
-            }
-
-            .app-header nav {
-                margin-top: 1rem;
-            }
-
-            .app-main {
-                padding: 1rem;
-            }
-
-            .login-form, .register-form {
-                padding: 1.5rem;
-            }
-        }
-    </style>
+    <link rel="stylesheet" href="styles.css">
 </head>
 <body></body>
 </html>
\ No newline at end of file
diff --git a/styles.css b/styles.css
new file mode 100644
index 0000000..886264c
--- /dev/null
+++ b/styles.css
@@ -0,0 +1,575 @@
+* {
+    margin: 0;
+    padding: 0;
+    box-sizing: border-box;
+}
+
+body {
+    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
+    background-color: #f8f9fa;
+    color: #333;
+    line-height: 1.6;
+}
+
+.app {
+    min-height: 100vh;
+    display: flex;
+    flex-direction: column;
+}
+
+.app-header {
+    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
+    color: white;
+    padding: 1rem 2rem;
+    display: flex;
+    justify-content: space-between;
+    align-items: center;
+    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
+}
+
+.app-header h1 {
+    margin: 0;
+    font-size: 1.8rem;
+}
+
+.app-header nav {
+    display: flex;
+    gap: 1rem;
+    align-items: center;
+}
+
+.app-header nav a {
+    color: white;
+    text-decoration: none;
+    padding: 0.5rem 1rem;
+    border-radius: 4px;
+    transition: background-color 0.2s;
+}
+
+.app-header nav a:hover {
+    background-color: rgba(255,255,255,0.2);
+}
+
+.app-main {
+    flex: 1;
+    padding: 2rem;
+    max-width: 1200px;
+    margin: 0 auto;
+    width: 100%;
+}
+
+/* Authentication Forms */
+.login-container, .register-container {
+    display: flex;
+    justify-content: center;
+    align-items: center;
+    min-height: 60vh;
+}
+
+.login-form, .register-form {
+    background: white;
+    padding: 2rem;
+    border-radius: 8px;
+    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
+    width: 100%;
+    max-width: 400px;
+}
+
+.login-form h2, .register-form h2 {
+    text-align: center;
+    margin-bottom: 2rem;
+    color: #333;
+}
+
+.form-group {
+    margin-bottom: 1.5rem;
+}
+
+.form-group label {
+    display: block;
+    margin-bottom: 0.5rem;
+    font-weight: 500;
+    color: #555;
+}
+
+.form-group input {
+    width: 100%;
+    padding: 0.75rem;
+    border: 1px solid #ddd;
+    border-radius: 4px;
+    font-size: 1rem;
+    transition: border-color 0.2s;
+}
+
+.form-group input:focus {
+    outline: none;
+    border-color: #667eea;
+    box-shadow: 0 0 0 2px rgba(102, 126, 234, 0.2);
+}
+
+.form-group input:disabled {
+    background-color: #f5f5f5;
+    cursor: not-allowed;
+}
+
+.login-button, .register-button {
+    width: 100%;
+    padding: 0.75rem;
+    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
+    color: white;
+    border: none;
+    border-radius: 4px;
+    font-size: 1rem;
+    font-weight: 500;
+    cursor: pointer;
+    transition: transform 0.2s, box-shadow 0.2s;
+}
+
+.login-button:hover, .register-button:hover {
+    transform: translateY(-1px);
+    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
+}
+
+.login-button:disabled, .register-button:disabled {
+    background: #ccc;
+    transform: none;
+    cursor: not-allowed;
+}
+
+.error-message {
+    background-color: #f8d7da;
+    color: #721c24;
+    padding: 0.75rem;
+    border-radius: 4px;
+    margin-bottom: 1rem;
+    border: 1px solid #f5c6cb;
+}
+
+.auth-links {
+    text-align: center;
+    margin-top: 2rem;
+    color: #666;
+}
+
+.auth-links a {
+    color: #667eea;
+    text-decoration: none;
+}
+
+.auth-links a:hover {
+    text-decoration: underline;
+}
+
+.logout-button {
+    background: rgba(255,255,255,0.2);
+    border: 1px solid rgba(255,255,255,0.3);
+    color: white;
+    padding: 0.5rem 1rem;
+    border-radius: 4px;
+    cursor: pointer;
+    transition: background-color 0.2s;
+}
+
+.logout-button:hover {
+    background: rgba(255,255,255,0.3);
+}
+
+/* Calendar View */
+.calendar-view {
+    height: calc(100vh - 140px); /* Full height minus header and padding */
+    display: flex;
+    flex-direction: column;
+}
+
+.calendar-loading, .calendar-error {
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    height: 100%;
+    background: white;
+    border-radius: 12px;
+    box-shadow: 0 4px 16px rgba(0,0,0,0.1);
+}
+
+.calendar-loading p {
+    font-size: 1.2rem;
+    color: #666;
+}
+
+.calendar-error p {
+    font-size: 1.2rem;
+    color: #d32f2f;
+}
+
+/* Calendar Component */
+.calendar {
+    background: white;
+    border-radius: 12px;
+    box-shadow: 0 4px 16px rgba(0,0,0,0.1);
+    overflow: hidden;
+    flex: 1;
+    display: flex;
+    flex-direction: column;
+}
+
+.calendar-header {
+    display: flex;
+    align-items: center;
+    justify-content: space-between;
+    padding: 1.5rem 2rem;
+    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
+    color: white;
+}
+
+.month-year {
+    font-size: 1.8rem;
+    font-weight: 600;
+    margin: 0;
+}
+
+.nav-button {
+    background: rgba(255,255,255,0.2);
+    border: none;
+    color: white;
+    font-size: 1.5rem;
+    font-weight: bold;
+    width: 40px;
+    height: 40px;
+    border-radius: 50%;
+    cursor: pointer;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    transition: background-color 0.2s;
+}
+
+.nav-button:hover {
+    background: rgba(255,255,255,0.3);
+}
+
+.calendar-grid {
+    display: grid;
+    grid-template-columns: repeat(7, 1fr);
+    flex: 1;
+    background: white;
+}
+
+.weekday-header {
+    background: #f8f9fa;
+    padding: 1rem;
+    text-align: center;
+    font-weight: 600;
+    color: #666;
+    border-bottom: 1px solid #e9ecef;
+    font-size: 0.9rem;
+    text-transform: uppercase;
+    letter-spacing: 0.5px;
+}
+
+.calendar-day {
+    border: 1px solid #f0f0f0;
+    padding: 0.75rem;
+    min-height: 100px;
+    display: flex;
+    flex-direction: column;
+    cursor: pointer;
+    transition: background-color 0.2s;
+    position: relative;
+}
+
+.calendar-day:hover {
+    background-color: #f8f9ff;
+}
+
+.calendar-day.current-month {
+    background: white;
+}
+
+.calendar-day.prev-month,
+.calendar-day.next-month {
+    background: #fafafa;
+    color: #ccc;
+}
+
+.calendar-day.today {
+    background: #e3f2fd;
+    border: 2px solid #2196f3;
+}
+
+.calendar-day.has-events {
+    background: #fff3e0;
+}
+
+.calendar-day.today.has-events {
+    background: #e1f5fe;
+}
+
+.calendar-day.selected {
+    background: #e8f5e8;
+    border: 2px solid #4caf50;
+    box-shadow: 0 0 8px rgba(76, 175, 80, 0.3);
+}
+
+.calendar-day.selected.has-events {
+    background: #f1f8e9;
+}
+
+.calendar-day.selected.today {
+    background: #e0f2f1;
+    border: 2px solid #4caf50;
+}
+
+.calendar-day.selected .day-number {
+    color: #2e7d32;
+    font-weight: 700;
+}
+
+.day-number {
+    font-weight: 600;
+    font-size: 1.1rem;
+    margin-bottom: 0.5rem;
+}
+
+.calendar-day.today .day-number {
+    color: #1976d2;
+}
+
+.event-indicators {
+    flex: 1;
+    display: flex;
+    flex-direction: column;
+    gap: 2px;
+}
+
+.event-box {
+    background: #2196f3;
+    color: white;
+    padding: 2px 4px;
+    border-radius: 3px;
+    font-size: 0.7rem;
+    line-height: 1.2;
+    overflow: hidden;
+    text-overflow: ellipsis;
+    white-space: nowrap;
+    cursor: pointer;
+    transition: background-color 0.2s;
+}
+
+.event-box:hover {
+    background: #1976d2;
+}
+
+.event-dot {
+    background: #ff9800;
+    height: 6px;
+    border-radius: 3px;
+    margin-bottom: 1px;
+}
+
+.more-events {
+    font-size: 0.7rem;
+    color: #666;
+    margin-top: 2px;
+    font-weight: 500;
+}
+
+/* Event Modal Styles */
+.modal-backdrop {
+    position: fixed;
+    top: 0;
+    left: 0;
+    right: 0;
+    bottom: 0;
+    background: rgba(0, 0, 0, 0.5);
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    z-index: 1000;
+    backdrop-filter: blur(2px);
+}
+
+.modal-content {
+    background: white;
+    border-radius: 12px;
+    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
+    max-width: 500px;
+    width: 90%;
+    max-height: 80vh;
+    overflow-y: auto;
+    position: relative;
+    animation: modalAppear 0.2s ease-out;
+}
+
+@keyframes modalAppear {
+    from {
+        opacity: 0;
+        transform: scale(0.9) translateY(-20px);
+    }
+    to {
+        opacity: 1;
+        transform: scale(1) translateY(0);
+    }
+}
+
+.modal-header {
+    display: flex;
+    align-items: center;
+    justify-content: space-between;
+    padding: 1.5rem 2rem 1rem;
+    border-bottom: 1px solid #e9ecef;
+}
+
+.modal-header h3 {
+    margin: 0;
+    color: #333;
+    font-size: 1.4rem;
+    font-weight: 600;
+}
+
+.modal-close {
+    background: none;
+    border: none;
+    font-size: 1.8rem;
+    color: #999;
+    cursor: pointer;
+    padding: 0;
+    width: 30px;
+    height: 30px;
+    border-radius: 50%;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    transition: all 0.2s;
+    line-height: 1;
+}
+
+.modal-close:hover {
+    background: #f8f9fa;
+    color: #666;
+    transform: scale(1.1);
+}
+
+.modal-body {
+    padding: 1.5rem 2rem 2rem;
+}
+
+.event-detail {
+    display: grid;
+    grid-template-columns: 100px 1fr;
+    gap: 1rem;
+    margin-bottom: 1rem;
+    align-items: start;
+}
+
+.event-detail strong {
+    color: #555;
+    font-weight: 600;
+    font-size: 0.9rem;
+    text-transform: uppercase;
+    letter-spacing: 0.5px;
+}
+
+.event-detail span {
+    color: #333;
+    font-size: 1rem;
+    line-height: 1.5;
+    word-break: break-word;
+}
+
+/* Responsive Design */
+@media (max-width: 768px) {
+    .calendar-header {
+        padding: 1rem;
+    }
+
+    .month-year {
+        font-size: 1.4rem;
+    }
+
+    .nav-button {
+        width: 35px;
+        height: 35px;
+        font-size: 1.2rem;
+    }
+
+    .weekday-header {
+        padding: 0.5rem;
+        font-size: 0.8rem;
+    }
+
+    .calendar-day {
+        min-height: 70px;
+        padding: 0.5rem;
+    }
+
+    .day-number {
+        font-size: 1rem;
+    }
+
+    .app-main {
+        padding: 1rem;
+    }
+
+    .calendar-view {
+        height: calc(100vh - 120px);
+    }
+}
+
+@media (max-width: 480px) {
+    .calendar-day {
+        min-height: 60px;
+        padding: 0.25rem;
+    }
+
+    .weekday-header {
+        padding: 0.5rem 0.25rem;
+    }
+
+    .day-number {
+        font-size: 0.9rem;
+    }
+}
+
+/* Mobile adjustments for modal */
+@media (max-width: 768px) {
+    .modal-content {
+        margin: 1rem;
+        width: calc(100% - 2rem);
+    }
+
+    .modal-header, .modal-body {
+        padding: 1rem 1.5rem;
+    }
+
+    .event-detail {
+        grid-template-columns: 80px 1fr;
+        gap: 0.75rem;
+        margin-bottom: 0.75rem;
+    }
+
+    .event-detail strong {
+        font-size: 0.8rem;
+    }
+
+    .event-detail span {
+        font-size: 0.9rem;
+    }
+
+    .app-header {
+        flex-direction: column;
+        text-align: center;
+        padding: 1rem;
+    }
+
+    .app-header nav {
+        margin-top: 1rem;
+    }
+
+    .app-main {
+        padding: 1rem;
+    }
+
+    .login-form, .register-form {
+        padding: 1.5rem;
+    }
+}
\ No newline at end of file