Update style.css

style.css

@@ -1,28 +1,587 @@
+@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');
+
+/* CSS Variables */
+:root {
+    --background: hsl(244, 7%, 96%);
+    --foreground: hsl(0, 0%, 20%);
+    --card: hsl(0, 0%, 100%);
+    --card-foreground: hsl(0, 0%, 20%);
+    --primary: hsl(35, 100%, 50%);
+    --primary-foreground: hsl(0, 0%, 100%);
+    --secondary: hsl(0, 0%, 100%);
+    --secondary-foreground: hsl(0, 0%, 53%);
+    --muted: hsl(240, 5%, 96%);
+    --muted-foreground: hsl(240, 4%, 46%);
+    --accent: hsl(193, 60%, 52%);
+    --accent-foreground: hsl(0, 0%, 100%);
+    --destructive: hsl(0, 84%, 60%);
+    --border: hsl(0, 0%, 88%);
+    --input: hsl(0, 0%, 88%);
+    --ring: hsl(35, 100%, 50%);
+    --radius: 0.75rem;
+    --orange: hsl(35, 100%, 50%);
+    --yellow: hsl(47, 100%, 56%);
+    --cyan: hsl(193, 60%, 52%);
+    --navy: hsl(222, 48%, 35%);
+    --shadow-sm: 0 2px 8px hsla(0, 0%, 0%, 0.08);
+    --shadow-lg: 0 4px 20px hsla(0, 0%, 0%, 0.1);
+    --shadow-card: 0 4px 20px hsla(0, 0%, 0%, 0.1);
+}
+
+/* Reset & Base */
+*, *::before, *::after {
+    box-sizing: border-box;
+    margin: 0;
+    padding: 0;
+    border-color: var(--border);
+}
+
+html {
+    scroll-behavior: smooth;
+}
+
 body {
-	padding: 2rem;
-	font-family: -apple-system, BlinkMacSystemFont, "Arial", sans-serif;
+    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
+    background-color: var(--background);
+    color: var(--foreground);
+    line-height: 1.6;
+    -webkit-font-smoothing: antialiased;
+    -moz-osx-font-smoothing: grayscale;
+}
+
+/* Utility Classes */
+.hidden {
+    display: none !important;
+}
+
+.min-h-screen {
+    min-height: 100vh;
+}
+
+.bg-background {
+    background-color: var(--background);
+}
+
+/* Container */
+.container {
+    max-width: 1280px;
+    margin: 0 auto;
+    padding: 0 1rem;
+}
+
+.container-full {
+    max-width: 100%;
+    padding: 0 1rem;
+}
+
+@media (min-width: 768px) {
+    .container-full {
+        padding: 0 2rem;
+    }
+}
+
+/* Animations */
+@keyframes fade-in {
+    from {
+        opacity: 0;
+        transform: translateY(10px);
+    }
+    to {
+        opacity: 1;
+        transform: translateY(0);
+    }
+}
+
+@keyframes slide-in {
+    from {
+        opacity: 0;
+        transform: translateX(20px);
+    }
+    to {
+        opacity: 1;
+        transform: translateX(0);
+    }
+}
+
+.animate-fade-in {
+    animation: fade-in 0.5s ease-out;
+}
+
+.animate-slide-in {
+    animation: slide-in 0.3s ease-out;
+}
+
+/* Header */
+.header {
+    border-bottom: 1px solid var(--border);
+    background-color: hsla(0, 0%, 100%, 0.8);
+    backdrop-filter: blur(12px);
+    -webkit-backdrop-filter: blur(12px);
+    position: sticky;
+    top: 0;
+    z-index: 50;
+}
+
+.header-content {
+    display: flex;
+    align-items: center;
+    justify-content: space-between;
+    padding: 1rem 0;
+    flex-wrap: wrap;
+    gap: 1rem;
+}
+
+.header-left {
+    display: flex;
+    align-items: center;
+    gap: 1rem;
+}
+
+.header-icon {
+    width: 3.5rem;
+    height: 3.5rem;
+    object-fit: contain;
+}
+
+.header-title {
+    font-size: 1.5rem;
+    font-weight: 700;
+    color: var(--foreground);
+}
+
+.header-subtitle {
+    color: var(--muted-foreground);
+    font-size: 0.875rem;
+}
+
+/* Main Content */
+.main-content {
+    padding: 2.5rem 0;
+}
+
+/* Intro Section */
+.intro-section {
+    text-align: center;
+    margin-bottom: 2.5rem;
+}
+
+.intro-title {
+    font-size: 1.875rem;
+    font-weight: 700;
+    color: var(--foreground);
+    margin-bottom: 1rem;
+}
+
+@media (min-width: 768px) {
+    .intro-title {
+        font-size: 2.25rem;
+    }
+}
+
+.intro-text {
+    font-size: 1.125rem;
+    color: var(--muted-foreground);
+    max-width: 42rem;
+    margin: 0 auto;
+}
+
+.intro-text strong {
+    color: var(--foreground);
+}
+
+/* Step Viewer */
+.step-viewer {
+    background-color: var(--card);
+    border-radius: 1rem;
+    overflow: hidden;
+    box-shadow: var(--shadow-card);
+    border: 1px solid var(--border);
+}
+
+/* Image Container */
+.image-container {
+    position: relative;
+    background-color: var(--secondary);
+    height: calc(100vh - 300px);
+    min-height: 300px;
+}
+
+.image-wrapper {
+    width: 100%;
+    height: 100%;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+}
+
+.step-image {
+    width: 100%;
+    height: 100%;
+    object-fit: contain;
+    cursor: pointer;
+    transition: transform 0.3s ease;
+}
+
+.step-image:hover {
+    transform: scale(1.02);
+}
+
+/* Step Counter */
+.step-counter {
+    position: absolute;
+    top: 1rem;
+    left: 1rem;
+    z-index: 10;
+    background-color: hsla(0, 0%, 100%, 0.9);
+    backdrop-filter: blur(8px);
+    -webkit-backdrop-filter: blur(8px);
+    padding: 0.5rem 1rem;
+    border-radius: 0.75rem;
+}
+
+.step-counter span {
+    font-size: 1.25rem;
+    font-weight: 700;
+    color: var(--foreground);
+}
+
+/* Fullscreen Button */
+.fullscreen-btn {
+    position: absolute;
+    top: 1rem;
+    right: 1rem;
+    z-index: 10;
+    background-color: hsla(0, 0%, 100%, 0.9);
+    backdrop-filter: blur(8px);
+    -webkit-backdrop-filter: blur(8px);
+    border: none;
+    border-radius: 0.5rem;
+    padding: 0.5rem;
+    cursor: pointer;
+    box-shadow: var(--shadow-lg);
+    transition: background-color 0.2s;
+}
+
+.fullscreen-btn:hover {
+    background-color: var(--card);
+}
+
+/* Placeholder */
+.placeholder {
+    width: 100%;
+    height: 100%;
+    display: flex;
+    flex-direction: column;
+    align-items: center;
+    justify-content: center;
+    background: linear-gradient(to bottom right, var(--muted), var(--secondary));
+    padding: 2rem;
+}
+
+.placeholder-circle {
+    width: 6rem;
+    height: 6rem;
+    border-radius: 50%;
+    background-color: hsla(240, 4%, 46%, 0.2);
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    margin-bottom: 1rem;
+}
+
+.placeholder-circle span {
+    font-size: 2.5rem;
+    font-weight: 700;
+    color: var(--muted-foreground);
+}
+
+.placeholder-circle-lg {
+    width: 8rem;
+    height: 8rem;
+}
+
+.placeholder-circle-lg span {
+    font-size: 3rem;
+}
+
+.placeholder-text {
+    font-size: 1.125rem;
+    color: var(--muted-foreground);
+}
+
+.placeholder-text-lg {
+    font-size: 1.25rem;
+    color: var(--muted-foreground);
+}
+
+/* YouTube Embed */
+.youtube-desktop {
+    display: none;
+    position: absolute;
+    bottom: 1rem;
+    right: 1rem;
+    width: 20rem;
+    aspect-ratio: 16 / 9;
+    z-index: 20;
+    border-radius: 0.5rem;
+    overflow: hidden;
+    box-shadow: var(--shadow-card);
+}
+
+@media (min-width: 768px) {
+    .youtube-desktop {
+        display: block;
+    }
+}
+
+.youtube-desktop iframe {
+    width: 100%;
+    height: 100%;
+    border: none;
+}
+
+.youtube-mobile {
+    width: 100%;
+    aspect-ratio: 16 / 9;
+    background-color: var(--secondary);
+}
+
+@media (min-width: 768px) {
+    .youtube-mobile {
+        display: none;
+    }
+}
+
+.youtube-mobile iframe {
+    width: 100%;
+    height: 100%;
+    border: none;
+}
+
+/* Navigation Controls */
+.nav-controls {
+    padding: 1.5rem;
+    background-color: var(--card);
+    border-top: 1px solid var(--border);
+}
+
+.nav-buttons {
+    display: flex;
+    align-items: center;
+    justify-content: space-between;
+    gap: 1rem;
+    margin-bottom: 1rem;
+    flex-wrap: wrap;
+}
+
+/* Buttons */
+.btn {
+    display: inline-flex;
+    align-items: center;
+    gap: 0.5rem;
+    font-size: 1rem;
+    font-weight: 500;
+    padding: 0.75rem 1.5rem;
+    border-radius: 0.5rem;
+    border: none;
+    cursor: pointer;
+    transition: all 0.2s;
+    font-family: inherit;
+}
+
+.btn:disabled {
+    opacity: 0.3;
+    cursor: not-allowed;
+}
+
+.btn-outline {
+    background-color: transparent;
+    border: 1px solid var(--border);
+    color: var(--foreground);
+}
+
+.btn-outline:hover:not(:disabled) {
+    background-color: var(--muted);
+    gap: 0.75rem;
+}
+
+.btn-primary {
+    background-color: var(--card);
+    color: var(--orange);
+    border: 1px solid var(--orange);
+}
+
+.btn-primary:hover:not(:disabled) {
+    background-color: var(--orange);
+    color: var(--primary-foreground);
+    gap: 0.75rem;
+}
+
+.btn-icon {
+    display: inline-flex;
+    align-items: center;
+    justify-content: center;
+    width: 2.25rem;
+    height: 2.25rem;
+    border-radius: 0.5rem;
+    border: 1px solid var(--border);
+    background-color: transparent;
+    cursor: pointer;
+    transition: background-color 0.2s;
+}
+
+.btn-icon:hover {
+    background-color: var(--muted);
+}
+
+/* Step Indicators */
+.step-indicators {
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    gap: 0.5rem;
+    padding: 0 1rem;
+    overflow-x: auto;
+}
+
+.step-indicator {
+    height: 0.75rem;
+    border-radius: 9999px;
+    transition: all 0.3s;
+    cursor: pointer;
+    border: none;
+}
+
+.step-indicator-inactive {
+    width: 0.75rem;
+    background-color: hsla(240, 4%, 46%, 0.3);
+}
+
+.step-indicator-inactive:hover {
+    background-color: hsla(240, 4%, 46%, 0.5);
+}
+
+.step-indicator-active {
+    width: 3rem;
+    background: var(--orange);
+    box-shadow: 0 0 20px hsla(35, 100%, 50%, 0.4);
+}
+
+/* Progress Bar */
+.progress-bar-container {
+    width: 100%;
+    background-color: var(--secondary);
+    border-radius: 9999px;
+    height: 0.5rem;
+    overflow: hidden;
+}
+
+.progress-bar {
+    height: 100%;
+    background: linear-gradient(to right, var(--yellow), var(--orange));
+    border-radius: 9999px;
+    transition: width 0.5s ease-out;
+}
+
+/* Footer */
+.footer {
+    border-top: 1px solid var(--border);
+    background-color: var(--card);
+    margin-top: 4rem;
+}
+
+.footer-text {
+    text-align: center;
+    padding: 1.5rem 0;
+    color: var(--muted-foreground);
+}
+
+.footer-link {
+    color: var(--foreground);
+    text-decoration: underline;
+    transition: color 0.2s;
+}
+
+.footer-link:hover {
+    color: var(--orange);
+}
+
+/* Fullscreen Modal */
+.fullscreen-modal {
+    position: fixed;
+    inset: 0;
+    z-index: 100;
+    background-color: var(--background);
+    display: flex;
+    flex-direction: column;
+    animation: fade-in 0.3s ease-out;
+}
+
+.fullscreen-header {
+    display: flex;
+    align-items: center;
+    justify-content: space-between;
+    padding: 1rem;
+    background-color: var(--card);
+    border-bottom: 1px solid var(--border);
+    flex-shrink: 0;
+}
+
+.fullscreen-title {
+    font-size: 1.125rem;
+    font-weight: 700;
+    color: var(--foreground);
+}
+
+.fullscreen-controls {
+    display: flex;
+    align-items: center;
+    gap: 0.5rem;
+}
+
+.zoom-level {
+    min-width: 3.75rem;
+    text-align: center;
+    font-weight: 500;
+    color: var(--foreground);
+}
+
+.fullscreen-content {
+    flex: 1;
+    position: relative;
+    overflow: hidden;
+    background-color: var(--secondary);
+}
+
+.fullscreen-image-container {
+    width: 100%;
+    height: 100%;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    overflow: hidden;
+    cursor: grab;
+}
+
+.fullscreen-image-container:active {
+    cursor: grabbing;
 }
 
-h1 {
-	font-size: 16px;
-	margin-top: 0;
+.fullscreen-image {
+    max-width: none;
+    user-select: none;
+    transition: transform 0.2s;
 }
 
-p {
-	color: rgb(107, 114, 128);
-	font-size: 15px;
-	margin-bottom: 10px;
-	margin-top: 5px;
+.fullscreen-placeholder {
+    position: absolute;
+    inset: 0;
 }
 
-.card {
-	max-width: 620px;
-	margin: 0 auto;
-	padding: 16px;
-	border: 1px solid lightgray;
-	border-radius: 16px;
+.fullscreen-nav {
+    flex-shrink: 0;
 }
 
-.card p:last-child {
-	margin-bottom: 0;
+.fullscreen-youtube-mobile {
+    flex-shrink: 0;
 }