/* ==========================================================================
   SteadFast Smart Tracking Pro — Premium Stylesheet
   ========================================================================== */

/* Theme Variables (Single Theme & Transparent Background) */
:root {
    --sf-bg-color: transparent;
    --sf-card-bg: #ffffff;
    --sf-border-color: #e2e8f0;
    --sf-text-color: #334155;
    --sf-title-color: #0f172a;
    --sf-muted-color: #64748b;
    --sf-input-bg: #f8fafc;
    --sf-card-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.05), 0 4px 6px -4px rgba(0, 0, 0, 0.05);
    /* --sf-brand-color: #2563eb; (অ্যাড করতে পারেন যদি আগে কোথাও ডিফাইন করা না থাকে) */
}

/* Base Wrapper Reset */
.sf-page-wrapper {
    box-sizing: border-box;
    background: transparent !important;
    padding: 60px 20px;
    min-height: 80vh;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    transition: all 0.3s ease;
}

.sf-container {
    max-width: 900px;
    margin: 0 auto;
}

.sf-title-wrapper {
    text-align: center;
    margin-bottom: 40px;
}

.sf-main-title {
    font-size: 38px;
    font-weight: 800;
    color: var(--sf-title-color, #0f172a);
    margin-bottom: 10px;
    letter-spacing: -0.5px;
    transition: color 0.3s;
}

.sf-main-subtitle {
    color: var(--sf-muted-color, #64748b);
    font-size: 16px;
    margin: 0;
    transition: color 0.3s;
}

.sf-tracking-card {
    background: var(--sf-card-bg, #ffffff);
    padding: 35px 40px;
    border-radius: var(--sf-border-radius, 20px);
    box-shadow: var(--sf-card-shadow, 0 10px 15px -3px rgba(0, 0, 0, 0.05));
    border: 1px solid var(--sf-border-color, #e2e8f0);
    text-align: left;
    transition: all 0.3s ease;
}

.sf-tracking-form {
    display: flex;
    width: 100%;
    gap: 20px;
    flex-wrap: wrap;
    align-items: flex-end;
}

.sf-input-group {
    flex: 1;
    min-width: 250px;
}

.sf-input-label {
    display: block;
    font-size: 11px;
    font-weight: 700;
    color: var(--sf-muted-color, #64748b);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 10px;
}

.sf-input-field {
    width: 100%;
    padding: 14px 18px;
    background: var(--sf-input-bg, #f8fafc);
    border: 1px solid var(--sf-border-color, #cbd5e1);
    border-radius: 10px;
    font-size: 15px;
    color: var(--sf-text-color, #0f172a);
    outline: none;
    transition: all 0.2s;
}

.sf-submit-btn {
    background: var(--sf-brand-color);
    color: white;
    border: none;
    padding: 14px 35px;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 700;
    cursor: pointer;
    box-shadow: 0 4px 6px -1px rgba(37, 99, 235, 0.2);
    transition: all 0.2s;
    height: 52px;
}

.sf-loading-wrapper {
    display: none;
    text-align: center;
    margin-top: 50px;
}

.sf-spinner {
    display: inline-block;
    width: 40px;
    height: 40px;
    border: 4px solid var(--sf-border-color, #e2e8f0);
    border-top-color: var(--sf-brand-color);
    border-radius: 50%;
    animation: sf-spin 1s linear infinite;
}

.sf-loading-text {
    color: var(--sf-muted-color, #64748b);
    font-size: 14px;
    margin-top: 10px;
    font-weight: 600;
}

@keyframes sf-spin {
    to {
        transform: rotate(360deg);
    }
}

.sf-support-box {
    max-width: 900px;
    margin: 40px auto 0;
    text-align: center;
    background: var(--sf-card-bg, #ffffff);
    padding: 20px;
    border-radius: var(--sf-border-radius, 16px);
    border: 1px solid var(--sf-border-color, #e2e8f0);
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
    flex-wrap: wrap;
    box-shadow: var(--sf-card-shadow, 0 4px 6px -1px rgba(0, 0, 0, 0.01));
}

.sf-support-text {
    font-weight: 700;
    color: var(--sf-text-color, #0f172a);
    font-size: 14px;
}

.sf-support-link {
    color: var(--sf-brand-color);
    font-weight: 700;
    text-decoration: none;
    font-size: 14px;
}

.sf-page-wrapper * {
    box-sizing: border-box;
}

/* Timeline Progress Bar Elements */
.sf-progress-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 40px;
    position: relative;
}

.sf-progress-line {
    position: absolute;
    top: 20px;
    left: 10%;
    right: 10%;
    height: 3px;
    background: var(--sf-border-color);
    z-index: 1;
}

.sf-progress-fill {
    position: absolute;
    top: 20px;
    left: 10%;
    height: 3px;
    background: var(--sf-brand-color);
    z-index: 2;
    transition: width 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.sf-step {
    position: relative;
    z-index: 3;
    text-align: center;
    width: 25%;
}

.sf-step-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--sf-card-bg);
    border: 2px solid var(--sf-border-color);
    margin: 0 auto 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    color: var(--sf-muted-color);
    font-weight: 800;
    transition: all 0.3s ease;
}

.sf-step.completed .sf-step-icon {
    background: var(--sf-brand-color);
    border-color: var(--sf-brand-color);
    color: #ffffff;
    box-shadow: 0 0 12px var(--sf-brand-color);
}

.sf-step-title {
    font-weight: 700;
    color: var(--sf-title-color);
    font-size: 13px;
    transition: color 0.3s;
}

.sf-step-date {
    color: var(--sf-muted-color);
    font-size: 11px;
    margin-top: 4px;
    transition: color 0.3s;
}

/* Modern Card Styling */
.sf-modern-card {
    background: var(--sf-card-bg);
    border-radius: 16px;
    border: 1px solid var(--sf-border-color);
    padding: 24px;
    margin-top: 24px;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    transition: all 0.3s ease;
}

.sf-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 24px;
    margin-top: 24px;
}

@media (max-width: 768px) {
    .sf-grid {
        grid-template-columns: 1fr;
    }

    .sf-progress-container {
        flex-direction: column;
        align-items: flex-start;
        gap: 25px;
        padding-left: 20px;
    }

    .sf-progress-line,
    .sf-progress-fill {
        left: 38px;
        top: 20px;
        bottom: 20px;
        width: 3px;
        height: auto;
    }

    .sf-step {
        width: 100%;
        display: flex;
        align-items: center;
        text-align: left;
        gap: 15px;
    }

    .sf-step-icon {
        margin: 0;
    }
}

/* Vertical Timeline Track */
.timeline-wrapper {
    padding-left: 10px;
}

.timeline-item {
    position: relative;
    padding-left: 24px;
    padding-bottom: 24px;
    border-left: 2px solid var(--sf-border-color);
}

.timeline-item:last-child {
    border-left-color: transparent;
    padding-bottom: 0;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -6px;
    top: 4px;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--sf-brand-color);
    box-shadow: 0 0 8px var(--sf-brand-color);
}

.timeline-date {
    font-size: 11px;
    color: var(--sf-muted-color);
    margin-bottom: 4px;
    font-weight: 700;
}

.timeline-title {
    font-weight: 700;
    color: var(--sf-title-color);
    font-size: 14px;
}

.timeline-desc {
    color: var(--sf-muted-color);
    font-size: 13px;
    margin-top: 4px;
    line-height: 1.4;
}

/* Animations */
@keyframes sfFadeIn {
    from {
        opacity: 0;
        transform: translateY(15px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.sf-modern-card,
.sf-grid {
    animation: sfFadeIn 0.4s ease-out forwards;
}