/* ---- Typography Scale ---- */
:root {
    --fs-display: 48px;   /* Hero ana başlık            */
    --fs-heading: 36px;    /* Section başlıkları (h2)    */
    --fs-subheading: 24px; /* Hero alt başlık            */
    --fs-body: 18px;       /* Gövde metin, kart başlıkları */
    --fs-nav: 18px;        /* Menü */
    --fs-small: 16px;      /* İkincil metin, nav, detay  */
    --fs-meta: 16px;       /* Açıklama / meta metinleri  */
    --fs-caption: 14px;    /* Badge, küçük etiketler     */
    --fs-micro: 14px;      /* Uppercase mikro etiketler  */
    --fs-tiny: 13px;       /* En küçük (countdown label) */
}

/* Base */
body {
    font-family: "Aleo", serif;
    color: #1a1a2e;
    font-weight: 400;
    font-size: var(--fs-body);
}

h1, h2, h3 {
    font-family: "Playfair Display", serif;
}

h4, h5, h6 {
    font-family: "Aleo", serif;
    font-weight: 700;
}

/* ===========================
   Navbar
   =========================== */
.navbar {
    background: rgba(255,255,255,0.97);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(0,0,0,0.06);
    height: 80px;
    padding: 0;
    transition: all 0.3s ease;
}

.navbar > .container {
    height: 100%;
    display: flex;
    align-items: center;
}

.navbar.scrolled {
    height: 64px;
    box-shadow: 0 2px 20px rgba(0,0,0,0.08);
}

.navbar .navbar-brand img {
    height: 32px;
    transition: height 0.3s ease;
}

.navbar.scrolled .navbar-brand img {
    height: 26px;
}

.navbar .nav-link {
    font-family: "Roboto", sans-serif;
    font-size: var(--fs-nav);
    font-weight: 500;
    color: #1a1a2e;
    padding: 8px 14px !important;
    border-radius: 6px;
    transition: all 0.2s;
    position: relative;
}

.navbar .nav-link::after {
    content: "";
    position: absolute;
    bottom: 2px;
    left: 14px;
    right: 14px;
    height: 2px;
    background: #1a1a2e;
    border-radius: 1px;
    transform: scaleX(0);
    transition: transform 0.25s ease;
}

.navbar .nav-link:hover {
    color: #1a1a2e;
    background: rgba(26,26,46,0.04);
}

.navbar .nav-link:hover::after {
    transform: scaleX(1);
}

.btn-register-nav {
    font-family: "Roboto", sans-serif;
    background: #1a1a2e;
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: var(--fs-meta);
    font-weight: 500;
    padding: 10px 24px;
    letter-spacing: 0.3px;
    transition: all 0.25s;
}

.navbar.scrolled .btn-register-nav {
    padding: 8px 20px;
    font-size: var(--fs-caption);
}

.btn-register-nav:hover {
    background: #2d2d4e;
    color: #fff;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(26,26,46,0.25);
}

/* Offcanvas Mobile Menu */
.offcanvas {
    border-left: none !important;
    box-shadow: -8px 0 32px rgba(0,0,0,0.1);
}

.offcanvas .nav-link {
    font-family: "Roboto", sans-serif;
    font-size: var(--fs-body);
    font-weight: 500;
    color: #1a1a2e;
    padding: 12px 16px;
    border-radius: 8px;
    transition: background 0.2s;
}

.offcanvas .nav-link:hover {
    background: #f8f9fb;
}

/* ===========================
   Hero
   =========================== */
.hero-section {
    background: linear-gradient(135deg, #0f0f23 0%, #1a1a2e 40%, #2d2d4e 100%);
    color: #fff;
    padding: 120px 0 80px;
    min-height: 92vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: "";
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(66,133,244,0.08) 0%, transparent 70%);
    border-radius: 50%;
}

.hero-badge {
    display: inline-block;
    font-family: "Roboto", sans-serif;
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.15);
    border-radius: 20px;
    padding: 8px 20px;
    font-size: var(--fs-caption);
    font-weight: 400;
    color: rgba(255,255,255,0.7);
    letter-spacing: 0.3px;
    margin-bottom: 28px;
}

.hero-title {
    font-family: "Playfair Display", serif;
    font-size: var(--fs-display);
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 16px;
    letter-spacing: -1px;
}

.hero-subtitle {
    font-size: var(--fs-subheading);
    font-weight: 400;
    color: rgba(255,255,255,0.6);
    margin-bottom: 40px;
}

.hero-details {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    margin-bottom: 12px;
}

.hero-detail-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: "Roboto", sans-serif;
    font-size: var(--fs-small);
    font-weight: 300;
    color: rgba(255,255,255,0.55);
}

.hero-detail-item i {
    color: rgba(255,255,255,0.35);
}

/* Countdown */
.countdown-wrap {
    display: flex;
    gap: 10px;
    margin-bottom: 40px;
}

.countdown-box {
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 10px;
    text-align: center;
    padding: 14px 18px;
    min-width: 76px;
}

.countdown-box .count-value {
    font-size: 28px;
    font-weight: 700;
}

.countdown-box .count-label {
    font-family: "Roboto", sans-serif;
    font-size: var(--fs-tiny);
    font-weight: 400;
    text-transform: uppercase;
    color: rgba(255,255,255,0.4);
    letter-spacing: 1px;
    margin-top: 4px;
}

.countdown-sep {
    font-size: 24px;
    font-weight: 700;
    color: rgba(255,255,255,0.2);
    align-self: center;
}

/* CTA */
.btn-hero-cta {
    font-family: "Aleo", serif;
    background: #fff;
    color: #1a1a2e;
    border: none;
    border-radius: 8px;
    font-size: var(--fs-body);
    font-weight: 600;
    padding: 16px 36px;
    transition: all 0.25s;
}

.btn-hero-cta:hover {
    background: #f0f0f0;
    color: #1a1a2e;
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.3);
}

.hero-free-label {
    font-family: "Roboto", sans-serif;
    font-size: var(--fs-meta);
    font-weight: 300;
    color: rgba(255,255,255,0.4);
    margin-top: 16px;
}

.hero-logos {
    display: flex;
    align-items: center;
    gap: 36px;
    margin-top: 56px;
    padding-top: 36px;
    border-top: 1px solid rgba(255,255,255,0.08);
}

.hero-logo-group {
    text-align: center;
}

.hero-logo-group small {
    display: block;
    font-family: "Roboto", sans-serif;
    font-size: var(--fs-tiny);
    font-weight: 400;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: rgba(255,255,255,0.3);
    margin-bottom: 10px;
}

.hero-logo-group img {
    height: 28px;
    opacity: 0.6;
    filter: brightness(0) invert(1);
}

/* ===========================
   Section Common
   =========================== */
.section-light {
    padding: 88px 0;
    background: #fff;
}

.section-gray {
    padding: 88px 0;
    background: #f8f9fb;
}

.section-dark {
    padding: 88px 0;
    background: #1a1a2e;
    color: #fff;
}

.section-title {
    font-family: "Playfair Display", serif;
    font-size: var(--fs-heading);
    font-weight: 700;
    margin-bottom: 12px;
}

.section-subtitle {
    font-family: "Roboto", sans-serif;
    font-size: var(--fs-subheading);
    font-weight: 300;
    color: #777;
    margin-bottom: 48px;
}

.section-dark .section-subtitle {
    color: rgba(255,255,255,0.5);
}

/* ===========================
   About
   =========================== */
.about-thanks {
    background: #f8f9fb;
    border-radius: 12px;
    padding: 32px 36px;
    margin-bottom: 48px;
    border-left: 4px solid #1a1a2e;
}

.about-thanks p {
    font-size: var(--fs-body);
    color: #555;
    line-height: 1.8;
    margin: 0;
}

.about-text p {
    font-size: var(--fs-body);
    color: #555;
    line-height: 1.8;
    margin-bottom: 22px;
}

.about-note {
    font-size: var(--fs-small);
    font-weight: 600;
    font-style: italic;
    color: #1a1a2e;
    margin-top: 32px;
    padding-top: 24px;
    border-top: 1px solid #e9ecef;
}

/* ===========================
   Why Attend
   =========================== */
.why-card {
    padding: 24px;
    border-radius: 10px;
    margin-bottom: 16px;
    background: #fff;
    border: 1px solid #eef0f4;
    transition: all 0.2s;
}

.why-card:hover {
    border-color: #d0d5dd;
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}

.why-card h6 {
    font-weight: 700;
    font-size: var(--fs-body);
    margin-bottom: 10px;
    color: #1a1a2e;
}

.why-card p {
    font-size: var(--fs-meta);
    color: #666;
    margin: 0;
    line-height: 1.7;
}

.why-reason-item {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    margin-bottom: 22px;
}

.why-reason-item i {
    color: #1a1a2e;
    font-size: 20px;
    margin-top: 3px;
    flex-shrink: 0;
}

.why-reason-item p {
    font-size: var(--fs-small);
    color: #555;
    line-height: 1.7;
    margin: 0;
}

.who-attending {
    background: #1a1a2e;
    color: #fff;
    border-radius: 12px;
    padding: 40px 36px;
    margin-bottom: 48px;
}

.who-attending-title {
    font-family: "Playfair Display", serif;
    font-size: var(--fs-heading);
    font-weight: 700;
    margin-bottom: 12px;
}

.who-attending-desc {
    font-size: var(--fs-small);
    color: rgba(255,255,255,0.65);
    line-height: 1.7;
    margin: 0;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

/* ===========================
   Speakers
   =========================== */
.speaker-card {
    text-align: center;
    padding: 36px 24px;
    border-radius: 12px;
    background: #fff;
    border: 1px solid #eef0f4;
    transition: all 0.2s;
}

.speaker-card:hover {
    box-shadow: 0 4px 16px rgba(0,0,0,0.06);
    border-color: #d0d5dd;
}

.speaker-avatar-wrap {
    position: relative;
    display: inline-block;
    margin-bottom: 20px;
}

.speaker-avatar {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background: #eef0f4;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    border: 3px solid #eef0f4;
    transition: border-color 0.2s;
}

.speaker-card:hover .speaker-avatar {
    border-color: #d0d5dd;
}

.speaker-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.speaker-avatar i {
    font-size: 32px;
    color: #999;
}

.speaker-bio-btn {
    position: absolute;
    bottom: 14px;
    right: 10px;
    width: 34px;
    height: 34px;
    border-radius: 50%;
    background: #1a1a2e;
    color: #fff;
    border: 2px solid #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s;
    padding: 0;
    font-size: 16px;
    line-height: 1;
}

.speaker-bio-btn:hover {
    background: #2d2d4e;
    transform: scale(1.1);
}

.speaker-card h6 {
    font-weight: 700;
    font-size: var(--fs-body);
    margin-bottom: 8px;
    color: #1a1a2e;
}

.speaker-card .speaker-title {
    font-size: var(--fs-meta);
    color: #777;
    margin-bottom: 4px;
}

.speaker-card .speaker-company {
    font-size: var(--fs-caption);
    color: #aaa;
}

/* Speaker Biography Modal */
.speaker-bio-modal {
    border: none;
    border-radius: 16px;
    overflow: hidden;
}

.speaker-bio-modal .modal-header {
    background: #f8f9fb;
    border-bottom: 1px solid #eef0f4;
    padding: 24px 28px;
}

.speaker-bio-modal-avatar {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    overflow: hidden;
    flex-shrink: 0;
    border: 2px solid #eef0f4;
}

.speaker-bio-modal-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.speaker-bio-modal-name {
    font-family: "Aleo", serif;
    font-size: var(--fs-body);
    font-weight: 700;
    color: #1a1a2e;
    margin: 0;
}

.speaker-bio-modal-title {
    font-size: var(--fs-meta);
    color: #777;
    margin-top: 2px;
}

.speaker-bio-modal-company {
    font-size: var(--fs-caption);
    color: #aaa;
    margin-top: 2px;
}

.speaker-bio-modal .modal-body {
    padding: 28px;
}

.speaker-bio-text {
    font-size: var(--fs-small);
    color: #555;
    line-height: 1.8;
    margin: 0;
}

/* ===========================
   Program
   =========================== */
.program-timeline {
    max-width: 720px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

/* Card base */
.program-card {
    background: #fff;
    border: 1px solid #eef0f4;
    border-radius: 12px;
    padding: 24px 28px;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.program-card:hover {
    border-color: #d0d5dd;
    box-shadow: 0 4px 16px rgba(0,0,0,0.06);
}

/* Card header — time + title inline */
.program-card-header {
    display: flex;
    align-items: baseline;
    gap: 16px;
}

.program-card-time {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-family: "Roboto", sans-serif;
    font-size: var(--fs-caption);
    font-weight: 500;
    color: #999;
    white-space: nowrap;
    flex-shrink: 0;
}

.program-card-time i {
    font-size: 12px;
}

/* Card body */
.program-card-title {
    font-family: "Playfair Display", serif;
    font-weight: 700;
    font-size: var(--fs-body);
    margin-bottom: 0;
    color: #1a1a2e;
}

.program-card-desc {
    font-size: var(--fs-meta);
    color: #777;
    margin-bottom: 4px;
    line-height: 1.6;
}

/* People list */
.program-people {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 8px;
}

.program-person {
    display: flex;
    align-items: center;
    gap: 12px;
}

.program-person-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: #eef0f4;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    overflow: hidden;
}

.program-person-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.program-person-avatar i {
    font-size: 14px;
    color: #999;
}

.program-person-info {
    font-size: var(--fs-meta);
    line-height: 1.5;
}

.program-person-info strong {
    color: #1a1a2e;
}

.program-person-info span {
    color: #999;
}

.program-role-label {
    font-family: "Roboto", sans-serif;
    font-size: var(--fs-micro);
    text-transform: uppercase;
    letter-spacing: 0.8px;
    font-weight: 500;
    color: #999;
    margin-top: 18px;
    margin-bottom: 4px;
    padding-left: 2px;
}

/* ===========================
   Event Details (Venue)
   =========================== */
.detail-card {
    background: #fff;
    border: 1px solid #eef0f4;
    border-radius: 12px;
    padding: 28px;
    height: 100%;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.detail-card:hover {
    border-color: #d0d5dd;
    box-shadow: 0 4px 16px rgba(0,0,0,0.06);
}

.detail-card i {
    font-size: 28px;
    color: #1a1a2e;
    opacity: 0.35;
    margin-bottom: 16px;
    display: block;
}

.detail-card h6 {
    font-weight: 700;
    font-size: var(--fs-body);
    color: #1a1a2e;
    margin-bottom: 10px;
}

.detail-card p {
    font-size: var(--fs-meta);
    color: #777;
    margin: 0;
    line-height: 1.7;
}

.event-summary-card {
    background: #fff;
    border: 1px solid #eef0f4;
    border-radius: 12px;
    padding: 32px 36px;
}

.event-summary-item {
    display: flex;
    gap: 14px;
    padding: 12px 0;
    border-bottom: 1px solid #eef0f4;
    font-size: var(--fs-small);
}

.event-summary-item:last-child {
    border-bottom: none;
}

.event-summary-item .label {
    min-width: 140px;
    font-family: "Roboto", sans-serif;
    color: #999;
    font-weight: 400;
}

.event-summary-item .value {
    color: #1a1a2e;
}

/* Venue CTA */
.btn-register-cta {
    font-family: "Aleo", serif;
    background: #1a1a2e;
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: var(--fs-body);
    font-weight: 600;
    padding: 16px 36px;
    transition: all 0.25s;
}

.btn-register-cta:hover {
    background: #2d2d4e;
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(26,26,46,0.25);
}

/* ===========================
   Sponsors
   =========================== */
.sponsor-category-label {
    font-family: "Roboto", sans-serif;
    font-size: var(--fs-micro);
    text-transform: uppercase;
    letter-spacing: 1.5px;
    font-weight: 500;
    color: #999;
    margin-bottom: 20px;
}

.sponsor-logo-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 24px;
    border-radius: 10px;
    background: #f8f9fb;
    border: 1px solid #eef0f4;
    min-height: 110px;
    text-decoration: none;
    color: #1a1a2e;
    transition: all 0.2s;
}

.sponsor-logo-card:hover {
    border-color: #d0d5dd;
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
    color: #1a1a2e;
}

.sponsor-logo-card img {
    max-height: 40px;
    max-width: 120px;
    opacity: 0.7;
}

.sponsor-logo-card .sponsor-name {
    font-size: var(--fs-caption);
    color: #999;
}

.sponsor-logo-card .sponsor-text-logo {
    font-size: var(--fs-body);
    font-weight: 700;
    color: #666;
}

.steelradar-desc {
    max-width: 700px;
    margin: 0 auto;
    font-size: var(--fs-small);
    color: #777;
    line-height: 1.8;
}

/* ===========================
   Footer
   =========================== */
.footer-contact {
    background: #f8f9fb;
    border-top: 1px solid #eef0f4;
    padding: 56px 0;
}

.footer-contact-title {
    font-family: "Playfair Display", serif;
    font-size: 22px;
    font-weight: 700;
    color: #1a1a2e;
    margin-bottom: 12px;
}

.footer-contact-desc {
    font-size: var(--fs-small);
    color: #777;
    margin: 0;
    line-height: 1.7;
}

.footer-contact-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 28px;
    border-radius: 8px;
    border: 1px solid #d0d5dd;
    background: #fff;
    color: #1a1a2e;
    font-family: "Roboto", sans-serif;
    font-size: var(--fs-small);
    font-weight: 500;
    text-decoration: none;
    transition: all 0.2s;
}

.footer-contact-btn:hover {
    border-color: #1a1a2e;
    background: #1a1a2e;
    color: #fff;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.footer-contact-btn i {
    font-size: 18px;
}

.footer-bottom {
    background: #1a1a2e;
    color: rgba(255,255,255,0.45);
    padding: 24px 0;
    font-family: "Roboto", sans-serif;
    font-size: var(--fs-caption);
}

.footer-social {
    display: flex;
    gap: 18px;
}

.footer-social a {
    color: rgba(255,255,255,0.35);
    font-size: 18px;
    transition: all 0.2s;
}

.footer-social a:hover {
    color: #fff;
    transform: translateY(-1px);
}

/* ===========================
   Responsive
   =========================== */
@media (max-width: 768px) {
    :root {
        --fs-display: 32px;
        --fs-heading: 24px;
        --fs-subheading: 16px;
    }

    .hero-section {
        padding: 100px 0 60px;
        min-height: auto;
    }

    .countdown-wrap {
        gap: 6px;
    }

    .countdown-box {
        min-width: 60px;
        padding: 10px 12px;
    }

    .countdown-box .count-value {
        font-size: 22px;
    }

    .hero-logos {
        flex-direction: column;
        gap: 16px;
    }

    .section-light, .section-gray, .section-dark {
        padding: 56px 0;
    }

    .program-card {
        padding: 20px;
    }

    .program-person-avatar {
        width: 36px;
        height: 36px;
    }

    .event-summary-item {
        flex-direction: column;
        gap: 4px;
    }

    .event-summary-item .label {
        min-width: auto;
    }
}