/* ===================================
   CALM SENIOR FREELANCER PORTFOLIO
   Dynamic Theme Switching (Amber + Blue)
   =================================== */

/* ===================================
   AMBER THEME (DEFAULT)
   =================================== */
.theme-amber {
    --bg-primary: #0d0d0d;
    --bg-secondary: #1a1a1a;
    --bg-tertiary: #262626;
    --text-primary: #f5f5f5;
    --text-secondary: #a3a3a3;
    --accent: #fbbf24;
    --accent-glow: rgba(251, 191, 36, 0.25);
    --accent-dim: #d97706;
    --accent-dark: #b45309;
    --border: rgba(251, 191, 36, 0.1);
}

/* ===================================
   BLUE THEME
   =================================== */
.theme-blue {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --text-primary: #e5e7eb;
    --text-secondary: #9ca3af;
    --accent: #38bdf8;
    --accent-glow: rgba(56, 189, 248, 0.25);
    --accent-dim: #0ea5e9;
    --accent-dark: #0284c7;
    --border: rgba(56, 189, 248, 0.1);
}

/* ===================================
   BASE STYLES
   =================================== */
:root {
    --font-heading: 'Epilogue', sans-serif;
    --font-body: 'DM Sans', sans-serif;
    --section-padding: 8rem 0;
    --container-padding: 2rem;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    font-size: 16px;
    overflow-x: hidden;
    transition: background-color 0.5s ease, color 0.5s ease;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* ===================================
   COLOR SWITCHER
   =================================== */
.color-switcher {
    position: fixed;
    top: 2rem;
    right: 2rem;
    width: 60px;
    height: 60px;
    background: var(--bg-tertiary);
    border: 2px solid var(--border);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    text-decoration: none;
    z-index: 10000;
    transition: all 0.3s ease;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    cursor: pointer;
}

.color-switcher:hover {
    transform: rotate(180deg) scale(1.1);
    border-color: var(--accent);
    box-shadow: 0 6px 30px var(--accent-glow);
}

/* ===================================
   TYPOGRAPHY
   =================================== */
h1, h2, h3 {
    font-family: var(--font-heading);
    font-weight: 600;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

h1 {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 700;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: 3rem;
    color: var(--text-primary);
}

h3 {
    font-size: 1.5rem;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

p {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* ===================================
   BUTTONS
   =================================== */
.btn {
    display: inline-block;
    padding: 1rem 2.5rem;
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 500;
    text-decoration: none;
    border-radius: 8px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
    position: relative;
    overflow: hidden;
    border: none;
}

.btn-primary {
    background: var(--accent);
    color: var(--bg-primary);
    box-shadow: 0 0 30px var(--accent-glow);
    font-weight: 600;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 40px var(--accent-glow);
    background: var(--accent-dim);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid var(--border);
}

.btn-secondary:hover {
    border-color: var(--accent);
    color: var(--accent);
    transform: translateY(-2px);
}

.btn-large {
    padding: 1.25rem 3rem;
    font-size: 1.1rem;
}

/* ===================================
   MODAL
   =================================== */
.modal {
    display: none;
    position: fixed;
    z-index: 9999;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.9);
    animation: fadeIn 0.3s ease;
}

.modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 3rem;
    max-width: 800px;
    width: 90%;
    position: relative;
    animation: slideUp 0.4s ease;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-close {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 2rem;
    cursor: pointer;
    transition: all 0.3s ease;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

.modal-close:hover {
    color: var(--accent);
    background: var(--bg-tertiary);
    transform: rotate(90deg);
}

.modal-content h2 {
    margin-bottom: 1rem;
    text-align: center;
}

.modal-subtitle {
    text-align: center;
    margin-bottom: 2.5rem;
    color: var(--text-secondary);
}

.booking-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
}

.booking-card {
    background: var(--bg-tertiary);
    padding: 2rem 1.5rem;
    border-radius: 12px;
    border: 1px solid var(--border);
    text-decoration: none;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 0.75rem;
    transition: all 0.3s ease;
}

.booking-card:hover:not(.booking-placeholder) {
    border-color: var(--accent);
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.4);
}

.booking-placeholder {
    opacity: 0.5;
    cursor: not-allowed;
}

.booking-icon {
    font-size: 2.5rem;
    display: block;
}

.booking-card h3 {
    font-size: 1.25rem;
    margin: 0;
    color: var(--text-primary);
}

.booking-card p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin: 0;
}

.coming-soon {
    color: var(--accent);
    font-weight: 500;
}

.booking-card small {
    font-size: 0.85rem;
    color: var(--text-secondary);
    opacity: 0.7;
}

/* ===================================
   HERO SECTION
   =================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 30%, var(--accent-glow) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, var(--accent-glow) 0%, transparent 50%),
        linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    z-index: -1;
    transition: background 0.5s ease;
}

.hero-background::before {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(var(--border) 1px, transparent 1px),
        linear-gradient(90deg, var(--border) 1px, transparent 1px);
    background-size: 100px 100px;
    animation: gridMove 20s linear infinite;
    opacity: 0.4;
}

@keyframes gridMove {
    0% { transform: translate(0, 0); }
    100% { transform: translate(100px, 100px); }
}

.hero-content {
    padding: var(--section-padding);
    text-align: center;
    position: relative;
    z-index: 1;
}

.hero-subtitle {
    font-size: clamp(1.25rem, 3vw, 1.75rem);
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    font-weight: 500;
}

.hero-description {
    max-width: 650px;
    margin: 0 auto 3rem;
    font-size: 1.1rem;
    color: var(--text-secondary);
}

.hero-buttons {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
}

.scroll-indicator {
    position: absolute;
    bottom: 3rem;
    left: 50%;
    transform: translateX(-50%);
}

.scroll-line {
    width: 2px;
    height: 60px;
    background: linear-gradient(to bottom, var(--accent), transparent);
    animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
    0%, 100% { opacity: 0.3; transform: translateY(0); }
    50% { opacity: 1; transform: translateY(10px); }
}

/* ===================================
   ANIMATIONS
   =================================== */
.fade-in {
    opacity: 0;
    animation: fadeIn 0.8s ease-out forwards;
}

.fade-in-delay-1 {
    opacity: 0;
    animation: fadeIn 0.8s ease-out 0.2s forwards;
}

.fade-in-delay-2 {
    opacity: 0;
    animation: fadeIn 0.8s ease-out 0.4s forwards;
}

.fade-in-delay-3 {
    opacity: 0;
    animation: fadeIn 0.8s ease-out 0.6s forwards;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===================================
   WHAT I DO SECTION
   =================================== */
.what-i-do {
    padding: var(--section-padding);
    background: var(--bg-secondary);
    position: relative;
}

.what-i-do::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
}

.what-i-do h2 {
    text-align: center;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.service-card {
    background: var(--bg-tertiary);
    padding: 2.5rem 2rem;
    border-radius: 12px;
    border: 1px solid var(--border);
    transition: all 0.3s ease;
    text-align: center;
}

.service-card:hover {
    transform: translateY(-8px);
    border-color: var(--accent);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5), 0 0 30px var(--accent-glow);
}

.service-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    display: block;
}

.service-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.service-card p {
    font-size: 1rem;
    color: var(--text-secondary);
}

/* ===================================
   HOW I WORK SECTION
   =================================== */
.how-i-work {
    padding: var(--section-padding);
    background: var(--bg-primary);
}

.how-i-work h2 {
    text-align: center;
}

.process-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 3rem;
    margin-bottom: 4rem;
}

.process-step {
    position: relative;
    padding-left: 1rem;
}

.process-step::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(to bottom, var(--accent), var(--accent-dark));
}

.step-number {
    font-family: var(--font-heading);
    font-size: 3rem;
    font-weight: 700;
    color: var(--accent);
    opacity: 0.3;
    margin-bottom: 1rem;
    line-height: 1;
}

.process-step h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.process-step p {
    color: var(--text-secondary);
}

.process-tagline {
    text-align: center;
    padding: 2rem;
    background: var(--bg-secondary);
    border-radius: 12px;
    border: 1px solid var(--border);
}

.process-tagline p {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 500;
    color: var(--accent);
    margin: 0;
}

/* ===================================
   BACKGROUND SECTION
   =================================== */
.background {
    padding: var(--section-padding);
    background: var(--bg-secondary);
}

.background h2 {
    text-align: center;
}

.background-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.background-content p {
    font-size: 1.2rem;
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

/* ===================================
   PAST FREELANCE WORK SECTION
   =================================== */
.past-work {
    padding: var(--section-padding);
    background: var(--bg-primary);
}

.past-work h2 {
    text-align: center;
}

.past-work-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2.5rem;
}

.past-work-item {
    background: var(--bg-secondary);
    border-radius: 16px;
    border: 1px solid var(--border);
    padding: 2.5rem 2rem;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
}

.past-work-item:hover {
    border-color: var(--accent);
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.4);
}

.past-work-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.past-work-icon {
    font-size: 2.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    background: var(--bg-tertiary);
    border-radius: 12px;
    border: 1px solid var(--border);
}

.past-work-item h3 {
    font-size: 1.5rem;
    margin: 0;
    color: var(--text-primary);
}

.past-work-description {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    font-size: 1rem;
    line-height: 1.6;
}

.past-work-features {
    list-style: none;
    margin-bottom: 2rem;
    flex-grow: 1;
}

.past-work-features li {
    color: var(--text-secondary);
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
    font-size: 0.95rem;
}

.past-work-features li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--accent);
}

.past-work-links {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.past-work-link {
    color: var(--accent);
    text-decoration: none;
    font-family: var(--font-heading);
    font-weight: 500;
    font-size: 1rem;
    display: inline-flex;
    align-items: center;
    transition: all 0.3s ease;
    padding: 0.75rem 1.5rem;
    background: var(--bg-tertiary);
    border-radius: 8px;
    border: 1px solid var(--border);
}

.past-work-link:hover {
    border-color: var(--accent);
    box-shadow: 0 5px 20px var(--accent-glow);
}

.past-work-link-secondary {
    color: var(--text-secondary);
    text-decoration: none;
    font-family: var(--font-heading);
    font-weight: 500;
    font-size: 1rem;
    padding: 0.75rem 1.5rem;
    background: transparent;
    border-radius: 8px;
    border: 1px solid var(--border);
    transition: all 0.3s ease;
}

.past-work-link-secondary:hover {
    color: var(--text-primary);
    border-color: var(--text-secondary);
}

/* ===================================
   SELECTED WORK SECTION
   =================================== */
.work {
    padding: var(--section-padding);
    background: var(--bg-secondary);
    position: relative;
}

.work::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
}

.work h2 {
    text-align: center;
}

.work-grid {
    display: grid;
    gap: 3rem;
    margin-bottom: 3rem;
}

.work-item {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 3rem;
    background: var(--bg-tertiary);
    border-radius: 16px;
    border: 1px solid var(--border);
    padding: 2rem;
    transition: all 0.3s ease;
}

.work-item:hover {
    border-color: var(--accent);
    transform: translateX(10px);
}

.work-image {
    display: flex;
    align-items: center;
    justify-content: center;
}

.work-placeholder {
    width: 100%;
    aspect-ratio: 4/3;
    background: var(--bg-secondary);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    border: 2px dashed var(--border);
}

.work-content {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.work-content h3 {
    font-size: 1.75rem;
    margin-bottom: 0.5rem;
}

.work-subtitle {
    color: var(--accent);
    font-size: 1rem;
    margin-bottom: 1.5rem;
    font-weight: 500;
}

.work-features {
    list-style: none;
    margin-bottom: 2rem;
}

.work-features li {
    color: var(--text-secondary);
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
}

.work-features li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--accent);
}

.work-link {
    color: var(--accent);
    text-decoration: none;
    font-family: var(--font-heading);
    font-weight: 500;
    font-size: 1.1rem;
    display: inline-flex;
    align-items: center;
    transition: all 0.3s ease;
}

.work-link:hover {
    gap: 0.5rem;
    text-shadow: 0 0 20px var(--accent-glow);
}

.work-note {
    text-align: center;
    color: var(--text-secondary);
    font-style: italic;
}

/* ===================================
   TESTIMONIALS SECTION
   =================================== */
.testimonials {
    padding: var(--section-padding);
    background: var(--bg-primary);
}

.testimonials h2 {
    text-align: center;
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2.5rem;
}

.testimonial-card {
    background: var(--bg-secondary);
    border-radius: 16px;
    border: 1px solid var(--border);
    padding: 2.5rem 2rem;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.testimonial-card:hover {
    border-color: var(--accent);
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.4);
}

.testimonial-header {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.testimonial-avatar {
    width: 60px;
    height: 60px;
    background: var(--bg-primary);
    border-radius: 50%;
    border: 2px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    flex-shrink: 0;
}

.testimonial-info h3 {
    font-size: 1.25rem;
    margin: 0 0 0.25rem 0;
    color: var(--text-primary);
}

.testimonial-title {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin: 0;
}

.testimonial-rating {
    color: var(--accent);
    font-size: 1.25rem;
    letter-spacing: 0.1em;
}

.testimonial-text {
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 1rem;
    margin: 0;
    font-style: italic;
}

.testimonial-text::before {
    content: '"';
    color: var(--accent);
    font-size: 2rem;
    line-height: 0;
    margin-right: 0.25rem;
}

.testimonial-text::after {
    content: '"';
    color: var(--accent);
    font-size: 2rem;
    line-height: 0;
    margin-left: 0.25rem;
}

/* ===================================
   CONTACT SECTION
   =================================== */
.contact {
    padding: var(--section-padding);
    background: var(--bg-secondary);
    position: relative;
}

.contact::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
}

.contact h2 {
    text-align: center;
}

.contact-intro {
    text-align: center;
    font-size: 1.2rem;
    margin-bottom: 3rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.contact-cta {
    text-align: center;
    margin-bottom: 4rem;
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.contact-card {
    background: var(--bg-tertiary);
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid var(--border);
    text-decoration: none;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    transition: all 0.3s ease;
    text-align: center;
}

.contact-card:hover {
    border-color: var(--accent);
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.4);
}

.contact-icon {
    font-size: 2.5rem;
    display: block;
}

.contact-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.contact-value {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    color: var(--text-primary);
    font-weight: 500;
}

/* ===================================
   FOOTER
   =================================== */
.footer {
    padding: 3rem 0;
    background: var(--bg-primary);
    text-align: center;
    border-top: 1px solid var(--border);
}

.footer p {
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
}

.footer-tagline {
    font-family: var(--font-heading);
    font-weight: 500;
    color: var(--accent);
    font-style: italic;
}

/* ===================================
   SCROLL ANIMATIONS
   =================================== */
.observe-fade {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.observe-fade.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===================================
   RESPONSIVE
   =================================== */
@media (max-width: 768px) {
    :root {
        --section-padding: 4rem 0;
        --container-padding: 1.5rem;
    }

    .color-switcher {
        width: 50px;
        height: 50px;
        font-size: 1.25rem;
        top: 1rem;
        right: 1rem;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 280px;
    }

    .process-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .past-work-grid {
        grid-template-columns: 1fr;
    }

    .work-item {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .testimonials-grid {
        grid-template-columns: 1fr;
    }

    .contact-grid {
        grid-template-columns: 1fr;
    }

    .modal-content {
        padding: 2rem 1.5rem;
    }

    .booking-options {
        grid-template-columns: 1fr;
    }
}